Auto Insert Formatted cells below

Hello,

I am trying to find a way to insert formatted cell below a cell that had a value entered in it. For example, If you set up cell A1 to be a heading with box border, and cell A2 blank with a box border. What I am looking for is to be able to type a 1 in cell A2, and have cell A3 automatically format with a box border.

I hope that makes sense.